I`m running a weedeater axle from magnum axle 5.5 drop, with reversed sping eyes, I may add one more leaf tho, but haven`t committed to it yet, I `ve been noting all your improvements on the 9`inch, i have a`69 bronco housing at 58 inches, I located one `69 lincoln 31 spline right side axle for it, length is right for the left side bronco, now I just have to buy one axle for the right side, and looking for 300 or 310 posi third member and discs for it, its just fun doing the cheap.... But I do like your cobra setup....